Improved horseshoe-machine



PATENT OFFICE.

S. IV. DAVIS, OF WILMINGTON, DELAWARE.

IMPROVED HORSESHOE-MACHINE.

Specification forming part of Letters Patent No. 13,977, dated August30, 1864.

To all whom it may concern Beit known that I, S. W. DAVIS, ofWilmington, Delaware, have invented an Improvement inHorseshoe-llachines and I do hereby declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

My invention consists of certain improvements, fully describedhereinafter, in the horseshoe-machine for which Letters Patent weregranted to me on the 17th day of November, 1863.

In order to enable others skilled in the art to make and use myinvention, I will now proceed to describe its construction andoperation.

On reference to the accompanying drawings, which form a part of thisspecification, Figure 1 represents sufficient of a horseshoe-machine toillustrate my present improvements, and Fig. 2 is a ground plan (partlyin section) of Fig. l.

As the improvements which I am about to explain have a direct bearin gon the horseshoemachine for which Letters Patent were granted to me onthe 17th day of November, 1863, it has not been deemed necessary toillustrate or describe any other parts of the machine than such asconstitute or are immediately connected with my said improvements.

A represents the base-plate of the machine 5 B, the vertical framesecured to or forming a part of the said base-plate; C, the slide, tothe lower end of which the jaws described in my aforesaid patent arehung, a reciprocating motion being imparted to this slide through themedium of a driving-shaft, to which is secured the crank-wheel D shownin red lines, Fig. 1, the pin a of the said crank-wheel passing througha curved slot in the upper end of the slide. One side of this slide isplaned perfectly straight and the planed surface bears against therollers e 6 c, which are arranged to turn in a box or frame, E, thelatter being arranged to tit snugly in a recess in the frame B, but sofreely that it can be adjusted in the said recess by means of setscrewsb.

F represents the horizontal sliding frame described in my aforesaidpatent as carrying the die for indenting the shoe and forming thedepressions in the same for receiving the nails.

Two plates, Gr and G', are connected to this frame F, the plates beingmaintained a given distance apart from each other by the rods h h. Ashaft, I, is arranged to turn in projections yi i on the base-plate, andto this shaft are secured the two cams J and J of the form representedin Fig. 1, the cam J being arranged to bear against the projection m onthe plate G and the cam J to bear against the projection n of the plateG. A rod, K, projects from the rear of the plate G through a rib, Z, onthe base plate, the rod having at the end a head or enlargement, q,between which and the said rib l intervenes a spiral spring, t, whichhas a tendency to draw the frame F toward the rear of the machine. Asthe driving-shaft revolves in the direction of the arrow, Fig. 1, thepin e of the crank-wheel D, acting in the curved slot of the slide C,tends to push the latter toward the frame B. An inordinate frictionwould be thus created were it not for the rollers e, which render themovement of the slide easy and uniform.

The indenting-dies described in my aforesaid patent are apt to becomerapidly deteriorated by being in contact with the hot horseshoe for aconsiderable time, the projection on the former which forms theindentation in the shoe being rendered useless in a short time from thiscause. To obviate this evil I have adopted the mechanism the operationof which I will now proceed to explain.

rlhe shaftIrevolves in the direction of the arrow,Fig. 1, and when thecam J comes in contact with the projection m of the plate G the frame,with the forming die, is moved forward rapidly so that the shoe may beindented. When the cam J leaves the plate G, the indentingdie hasperformed its'duty. An interval elapses between the time the cam Jleaves the projection m and the time the cam J comes in contact with theprojection n during this interval; therefore the frame F and itsindenting-die are free from the control of the cams and under that ofthe spring t, which quickly pulls the frame F back and withdraws theindenting-die from the heated shoe, the farther backward movement of theframe being completed more slowlyand certainly by the cam J acting onthe projection n of the plate G. The sudden backward movement of theframe F, caused by the spring t during the temporary cessation of theaction ofthe cams, thus backward movement may be imparted to the saiddie independent of tha-t derived from the action of the cam J', asherein set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

S. WV. DAVIS.

Witnesses HENRY HowsoN, CHARLES H owsoN.

